I bought it from BBK. Got a better price, installed it on my 2015 Camaro SS/RS 6-Spd with LS3 manual transmission. Significantly lighter than factory manifolds. Noticeable increase in performance. I have a K&N TYPHOON CAI. MSD combines JET throttle body gasket, FLOWMASTER Super 40 muffler and VITESSE throttle control. I slid all the way down the ramp and left the freeway clutch foot down. How much power? I'm not sure, but it's noticeable in every gear. I went with these because 700+ for long whistles and a bit more power gain or not wasn't worth it to me. I've been driving the car for a few months and I'm very satisfied. Have it professionally installed. The shop said they also needed to remove the factory bolts on the rear exhaust flanges where the back of the header meets the factory pipe and install screws. never mind Fits perfectly. I recommend to everyone. Excellent quality. Superior performance. Note. WILL NOT make the exhaust any louder unless you remove the rear crampons, which I haven't done yet.
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